Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Continuous circulation drilling method










Image Number 5 for United States Patent #6739397.

Methods and apparati are disclosed for continuous circulation of drilling fluids while adding or removing tubulars to and from a drill string, and also for continuing drilling during the addition or removal of tubulars to and from the drill string.








 
 
  Recently Added Patents
Radio transmitter and radio receiver with channel condition assessment
Computer program and apparatus for evaluating signal propagation delays
Method for producing interferon alpha 5
Toy ball
Frame timing synchronization in a geostationary satellite system
Stable aqueous composite compositions
Method of driving stereoscopic display apparatus and stereoscopic display apparatus
  Randomly Featured Patents
Deflection yoke
Semiconductor radiation detector
Process for the preparation of a high purity protamine-DNA complex and process for use of same
Friction disc for false twisting
Method, device, and system concerning heart stimulation
Traveling direction measuring apparatus and traveling direction measuring method
Call announcement arrangement
Teaching device for attachment to an organ
Self-chargeable electronic timepiece with operating voltage checking
Method and apparatus for providing Hindi input to a device using a numeric keypad